Power supply circuit and frequency adjustment method

Abstract

A power supply circuit and a frequency adjustment method are provided, to improve running stability of a processing module ( 200 ). The power supply circuit obtains an operating voltage of the processing module ( 200 ), and generates, based on the operating voltage, a clock signal that indicates an operating frequency of the processing module ( 200 ), so that the processing module ( 200 ) runs at an operating frequency corresponding to a current operating voltage. Even if the operating voltage fluctuates, running of the processing module ( 200 ) is not affected. This improves running stability of the processing module ( 200 ) without increasing power consumption.

1 . A power supply circuit, comprising:
 a power supply module;   a processing module;   a clock generator module; and   wherein:
 the power supply module is configured to supply power to the processing module at a variable operating voltage; 
 the clock generator module is configured to: generate, based on the operating voltage, a clock signal with a variable operating frequency, and provide the clock signal to the processing module; and 
 the processing module is configured to run based on the operating voltage and the operating frequency. 
   
     
     
         2 . The circuit according to  claim 1 , wherein the clock generator module is configured to generate, based on the operating voltage, the clock signal that meets a preset frequency-voltage mapping relationship. 
     
     
         3 . The circuit according to  claim 1 , further comprising:
 a clock measurement module, coupled to the clock generator module, wherein the clock measurement module is configured to determine an average frequency of variable operating frequencies within a preset time period; and   a voltage regulator module, configured to: receive the average frequency, and adjust, based on the average frequency and a target operating frequency, the operating voltage used by the power supply module to supply power.   
     
     
         4 . The circuit according to  claim 3 , wherein the power supply module comprises a direct current power supply unit and a digital voltage stabilizer unit;
 the direct current power supply unit is configured to supply power to the digital voltage stabilizer unit; and   the digital voltage stabilizer unit is configured to: supply power to the processing module at the operating voltage, and when a power supply dip occurs, increase the operating voltage to a voltage value before the power supply dip.   
     
     
         5 . The circuit according to  claim 4 , wherein the digital voltage stabilizer unit is further configured to send an alarm signal to the voltage regulator module when the power supply dip occurs, and the voltage regulator module is further configured to increase, based on the alarm signal, a voltage at which the direct current power supply unit supplies power to the digital voltage stabilizer unit. 
     
     
         6 . The circuit according to  claim 4 , wherein there are N processing modules, N clock generator modules, N clock measurement modules, and one or N voltage regulator modules, the power supply module comprises one direct current power supply unit and N digital voltage stabilizer units, and the direct current power supply unit is configured to supply power to the N digital voltage stabilizer units, wherein N is a positive integer greater than 1. 
     
     
         7 . The circuit according to  claim 4 , wherein the digital voltage stabilizer unit and the processing module corresponding to the digital voltage stabilizer unit are integrated into a chip. 
     
     
         8 . The circuit according to  claim 1 , wherein the clock generator module is integrated with the processing module. 
     
     
         9 . A method for adjusting a frequency of a power supply circuit, wherein the power supply circuit comprises a power supply module and a processing module, the power supply module is configured to supply power to the processing module at a variable operating voltage, the method comprising:
 obtaining the operating voltage;   generating, based on the operating voltage, a clock signal with a variable operating frequency; and   providing the clock signal for the processing module, wherein the processing module is configured to run based on the operating voltage and the operating frequency.   
     
     
         10 . The method according to  claim 9 , wherein the generating, based on the operating voltage, a clock signal with a variable operating frequency comprises:
 generating, based on the operating voltage, the clock signal that meets a preset frequency-voltage mapping relationship.   
     
     
         11 . The method according to  claim 9 , wherein the method further comprises:
 determining an average frequency of variable operating frequencies within a preset time period; and   adjusting, based on the average frequency and a target operating frequency, the operating voltage used by the power supply module to supply power.   
     
     
         12 . The method according to  claim 11 , wherein the power supply module comprises a direct current power supply unit and a digital voltage stabilizer unit, the direct current power supply unit is configured to supply power to the digital voltage stabilizer unit, the digital voltage stabilizer unit is configured to: supply power to the processing module at the operating voltage, and when a power supply dip occurs, increase the operating voltage to a voltage value before the power supply dip. 
     
     
         13 . The method according to  claim 12 , wherein the digital voltage stabilizer unit is further configured to send an alarm signal when the power supply dip occurs, and the method further comprises:
 increasing, based on the alarm signal, a voltage at which the direct current power supply unit supplies power to the digital voltage stabilizer unit.   
     
     
         14 . The method according to  claim 12 , wherein there are N processing modules, the power supply module comprises one direct current power supply unit and N digital voltage stabilizer units, and the direct current power supply unit is configured to supply power to the N digital voltage stabilizer units, wherein N is a positive integer greater than 1. 
     
     
         15 . The method according to  claim 12 , wherein the digital voltage stabilizer unit and the processing module corresponding to the digital voltage stabilizer unit are integrated into a chip. 
     
     
         16 . The method according to  claim 9 , wherein the clock generator module is integrated with the processing module.